Does a White Court Vampire get limited to a single type of emotion at character creation, or can they feed from lust one day and fear another?
White Court vampires in general stick with a single "flavor" of emotion. There are multiple references to the fact that this is not a true limitation. However, there is a systematic limit, which makes it a bit murkier.
From powers on same page:
From weaknesses on same page:
Again, emphasis mine.
However, from a system-based standpoint, turn to
Can this be bought off then, from the indications in Our World? It doesn't really say. But for all intents and purposes, from the limits in RPG, the must is a hard limit. And since the question refers to limits at character creation, the answer is, yes, there is a limit that must be chosen.
White Court vampires belong to various families. The families each have a different emotion they feed on, usually a "negative" one. (I will ignore here the fact that such judgements can be tricky - what is it, exactly, that makes Lust negative, for example? People have done stupid and destructive things for Love, too, right?)
But leaving that aside, the simple answer is:
A White Court vampire feeds from and is able to stoke a single kind of emotion.
Page references coming as soon as I can find them for you.